Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adc94a3fb338d23…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 10:29:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fbae2cc5d16d334b19a7679bacac5c6e SHA-1: 7db14ad643397b2f278b6b0c8bb6cc9d5d7f4c3d SHA-256: 2adc94a3fb338d237fcc0ff17b3ee955ceff97fd0ab690a12f9e2c9c26b11cbb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external websites, many of which are hosted on emcladder.com and appear to be part of a link farm designed to attract users searching for Roblox hacks. The document body explicitly mentions 'Roblox 4all Cool Robux Hack' and includes a URL pointing to a potential executable download. This suggests the document is a lure to trick users into downloading malware disguised as a game hack. No scripts were extracted, but the overall structure and content strongly indicate a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/roblox-4all-cool-robux-hack-game-hack
    • https://www.emcladder.com/uploaded_files/userfiles/files/is-roblox-being-hacked-2021_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-com_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/como-usar-hack-en-los-juegos-de-roblox_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/free-robux-no-verificationor-offer_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-xd-hacker-cheater-xd_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/free-robux-for-samsung_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-to-hack-on-dragon-ball-z-rage-roblox_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-friend-hack_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-studio-free-download-for-ipad_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/hacking-system-o-n-roblox_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/free-robux-2021-on-phone_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/cmd-robux-hack-real_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-to-hack-into-a-full-server-on-roblox_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/hacks-for-roblox-weight-lifting-simulator-3_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-dop-you-get-free-robux_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-cheat-engine-duplicate-assassin_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-streets-of-bloxwood-remastered-hack_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/fly-roblox-lauc-script-hack_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/hacks-for-bitcoin-miner-roblox_GM431946152.pdf
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-hack-free-robux-script_GM431946152.pdf
    • https://www.emcladder.co
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0c.bin
eaf19753b176304570dd6aa4d0eb4b42bcf55d64da6f2668ff0e9883785b4732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0C 22552 bytes
font_01_sfnt_off0000615d.bin
d5d0b586ba8d90c2fa7720ac412ac293786898e682ac3a16a2e6aa4f53299113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615D 18860 bytes

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